Please provide more details and screenshots.
Which situation are you using? Which graphics settings? Are you limted by MainThread, the GPU or what?
It’s hard to help without having the bare minimum of information about your setup.
Also try using Clear Skies, disable all traffic, try different graphics settings. Just to see which of the options might help and then narrow the issue down.
Delete Rolling Cache and Manual Cache, make sure your virtual memory is set up properly,…